package com.hyl.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.hyl.common.constant.AuthServerConstant;
import com.hyl.common.exception.BizCodeEnume;
import com.hyl.common.utils.R;
import com.hyl.common.vo.MemberRespVo;
import com.hyl.gulimall.auth.feign.MemberFeignService;
import com.hyl.gulimall.auth.feign.ThirdPartFeignService;
import com.hyl.gulimall.auth.vo.UserLoginVo;
import com.hyl.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate stringRedisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    /**
     * 发送一个请求直接跳转到一个页面
     * SpringMVC viewController;将请求和页面映射
     */

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {

        String redisCode = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //60内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //TODO 1.接口防刷

        //2.验证码的再次校验。
        String code = String.valueOf((Math.random() * 9 + 1) * 1000).substring(0, 4) + "_" + System.currentTimeMillis();
        //redis缓存验证码，防止同一个phone在60秒内再次发送验证码

        stringRedisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, code, 60, TimeUnit.SECONDS);


        thirdPartFeignService.sendCode(phone, code.substring(0, 4));
        return R.ok();

    }

    /**
     * //TODO 重定向携带数据，利用session原理，将数据放在session中，
     * 只要跳到下一个页面取出这个数据后session里面的数据就会删掉
     * <p>
     * <p>
     * TODO 1,分布式下的session问题
     * RedirectAttributes redirectAttributes :模拟重定向携带数据
     *
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {

            /**
             * .map(error->{
             *                 String field = error.getField();
             *                 String defaultMessage = error.getDefaultMessage();
             *                 errors.put(field,defaultMessage);
             *                 return
             *             })
             *
             */
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors", errors);
            //校验出错，转发到注册页面
            return "redirect:http://www.auth.gulimall.com/reg.html";
        }

        //真正注册，调用远程服务注册页
        //1.校验验证码
        String code = vo.getCode();
        String s = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {

            if (code.equals(s.split("_")[0])) {
                //删除验证码;令牌机制
                stringRedisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());

                //验证码通过,真正注册，调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0) {
                    //成功
                    return "redirect:http://www.auth.gulimall.com/login.html";
                } else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg", new TypeReference<String>() {
                    }));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://www.auth.gulimall.com/reg.html";
                }

            } else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                return "redirect:http://www.auth.gulimall.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://www.auth.gulimall.com/reg.html";
        }
    }


    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute==null){
            //没登录
            return "login";
        }else {
            return "redirect:http://www.gulimall.com";
        }

    }

    @PostMapping(value = "/login")
    public String login(UserLoginVo vo, RedirectAttributes attributes, HttpSession session) {

        //远程登录
        R login = memberFeignService.login(vo);

        if (login.getCode() == 0) {
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {});
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://www.gulimall.com";
        } else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            attributes.addFlashAttribute("errors",errors);
            return "redirect:http://www.auth.gulimall.com/login.html";
        }
    }

}
